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General design basis for a final optics assembly to decrease filamentary damage

  • [设施]:神光Ⅱ
  • [期刊/会议名称]:Chinese Physics B
  • [摘要]:The high-power laser beam in the final optics assembly of high-power laser facilities is often modulated by contamination particles, which may cause local high light intensity, thereby increasing the filamentary damage probability for optical components. To study the general design basis for a final optics assembly to decrease the risk of filamentary damage,different-sized contamination particles deposited on a component surface are simulated to modulate a 351-nm laser beam based on the optical transmission theory, and the corresponding simulation results are analyzed statistically in terms of the propagation characteristic and the light field intensity distribution of the modulated laser beam. The statistical results show that component thickness and distance between components can to some extent be optimized to reduce the appearance of local high light intensity, and the general design basis of component thickness and arrangement are given for different control levels of particle sizes. Moreover, the statistical results can also predict the laser beam quality approximately under the existing optics design and environmental cleanliness. The optimized design for final optics assembly based on environmental cleanliness level is useful to prolong the lifetime of optics and enhance the output power of high-power laser facilities.
  • [发表日期]:2015
  • [第一作者]:孙晓艳
  • [第一作者单位]:上海光机所
  • [通讯作者]:孙晓艳
  • [通讯作者单位]:上海光机所
  • [论文类型]:null
  • [期刊分类]:SCI1区
  • [学科分类]:物理
  • [影响因子]:1.3860
  • [关键词]: optical design; high power laser beam; contamination particles; component damage;
  • [卷号]:24
  • [期号]:5
  • [起止页码]:054209
  • [简介]: